Fluid filter and the like



Jan. 13, 1931. E. F. DELERY FLUID FILTER AND THE LIKE filed June 26, 1925 ,2Sheets-Sheet 1 "Jan. 13, 1931. E. F. bELERY; 1,788,383

FI JUID FILTER AND THE LIKE Filed June 26, 192 2 Sheets-Sheet 2 ,F'Ja .fX 1m if? 7 ,Zffyi Patented Jan. 13,1931.

UNITED STATES Ens-nun FRANK DELERY, on NEW nurturing Louisiana; Janna. .ijnsnriinit manner,

'IU'IRIX, ADMINISTERING THE ESTATE OF CEASED "sAiD EUGENE FRANK Durante; nit

FLUID FILTER emit-gamin Application filed June 26,

This invention relates to fluid'filtering machines wherein a filtering 1nedium,-a screen lng element and an expansion chamber are combined to form a filter.

The principal object of the invention is to provide means whereby the fluid is evenlydistributed both in filtering and in washing over the entire bed of the filter and guided in the correct direction of flow, so as to take advantage of the maximum part of the veloc-ity. head in the fluid, of the whole filter bed for filtering and washing purposes, secure a uniform distribution of wash fiow and simplify construction and repair. i

The invention consists in means whereby the fluid passes through 'orificesdirected in stantially horizontal screen, beneath the filterlng medium, reglsterlng with an expansion' chamberfbeneath the screen. The

screen is supported in a suitable manner from the floor of the expansion chamber on short columns. The expansion chamber registering with the discharge passage 1 through curved passages in the direction of low. The screen beneath the filtering medium covers the whole filter bottom and makes it completely available.

It also consists in a filter box registering with the supply passage around its whole 'periphery, and in the several combinations and parts defined in the appended claims; and

particularly set forth in the ensuing descript on and lllustrated 1n the accompanying drawings.

In the drawings in which like reference characters indicate like parts'throughout the several views:

Figure 1 is an enlarged view in plan of a part of the typical screen;

line 2-2;

Figure 3 is an elevation of Fig. l onthe line 33;

Figure & is a plan view of a filter with the filter box arranged to take fluid around its whole periphery, and shows the screen par tially cut away to show the screen supports and the directing vanes and central discharge passage.

16*; on 11 '1;1-. '1 Figure 12=is anthe direction of flow and depressed in a subcation thereof;

Figure 2- is a section through 1 on the raga, s n ine e aser-.4

endsupply' channel and a central: discharge V elevationotEigurelOz In' all v ews the nvention is shown embodied a filter of; theitype'usually designated as rapids a-nd filter but i'snot to -be an: derstood; as being- 'li-rnifted to this type by the particular embodiments disclosed for the "In the drawings 1 designates"the-depressed orifices,- 2 the body of}; t'he'fscreen in which 4 a; longitudinal form of screen support 5, the expansion chamber beneath the screen;

6", the discharge pipe {7 the curved vanes 1 betweenthe chamber 5 and the, discharge passage 8, the lbwer coa-rse filtering medium-(fusually' graded gravel) and 9the fine "topfilteringj medium- (usual-lysand) 10-, the

wall over whi 'ch' the fluid flowsto the filter; 11, the supply passage 12, the exteriorsupply pipe 13, the'er'cterior wall of the supply passage;- 14, the Wa sh-water gutterin that type i-gure 5 'i-s a section through; Figure/l; on 'the l'iire5 -5; a Figure 6,is an enct elevation ofFFigure 4 Figure 7 is a planjview olith-is invention purpose of illustrating the practicalappli- 1 depressed; .This i'sth'e important part of this invention and wilt be specially "cl-aimed? p f 3 indicates supports for holding the screen "above ,thebottom or. theferrpansion chamber of filter; 1-5; the wash-water supply passage beneath the screen; and 1 6, the curved passages" between the vanes 71 1 4 1 Itwill be observed,*in Figures 4' and 10, that-thescreen 2 has been partially cut away to show the vanes 7 ,passages 16 andl5 and the supportsfi. Itwilll be observed in all figures that the screen is placed altogether beneath the filtering media 8 and 9 and that,

in all cases whether filtering or washing by reversed flow, the orifices both receivezand discharge the fluid in the direction of flow. This-is an important point of thisinventiom It will be observed in all figuresthat in all cases the screenis placed-intermediate of the filtering medium and the expansion chamber (and discharge passage, when the discharge passage is beneaththe screen) with the orifices 1 protruding into' the expansion chamber. 1

In Figure 1 by arranging thewalls 10 so that fluid may pass over 10 all'around-the filter it is believed that a great improvement v over the usual types of filters has been made,

by reducing the distanceof travel. ofthe fluid and. neutralizing the directionof travel i above the filter medium. I

In operation the screen .15 the 7::

M filter that when filteringor whenthe flow is reversed to wash the filter, the orifice vopenings face the fiow of the entering fluid and direct it in the direction in which it is'discharged. I

V In filtering the fluid entersthrough the ex- I terior supply pipe to the supply passage 11,

flows over the wall 10, filters through the filtering media 8 and 9 thence throughthe screen 2 by way oi the depressed orifices '1 to the chamber 5 in the directionjof the, passages 16, throughtheseto'the discharge pas-. sage 15 in'the direction offiow in this passage, witha minimum loss of head and out V at the dischargeTpipe GL 1 V To wash the operation-1s reversed, fluid 7 entersthrough 6 to 15 to 16 to 5 to 1 to ,8 to 9 over. 10 to 11 and out 12 to the'drain, meeting the orifices 1 and discharging from them in the normal direction offlcw. i

Anothe rimprovement over the usualtype is shown in havlng the filtering media above the screen where it can be renewed. and cleaned without removing the screen, and where its weight tends tohold down the Q- screen during washing, without the necessity i of bolts or other fastenings. It may be freer :ly' supported on-thesupports3 if sodesired. V j

It is not claimed that a filter using a filtering medium, and a perforated screen, washed 7 by reversing the flow isnew, nor that the use of aoperforated-screen is new, nor that the use of a screen extending over'the whole in: filter bottom is new, buthaving described my invention, I claim:

The combination of a filterbed, a perforat- V ed supporting plate for said bed, an expansion chamber below said plate, the plate having water directing members extending,

downwardly from said-perforations into the "expansion chamber andiopening laterally to j the, filter bed.

receive and direct wash water from below into NE F. DELER i, 7 

